Using bigger tires is the equivalent of using a numerically lower final drive
ratio or a higher gear. You get better gas mileage by driving 60 in 5th instead
of 3rd. The increased throttle opening required with the bigger tires does not
use as much air/fuel as the higher rpms of using a lower gear (or final drive
ratio) would.
Am I clear as mud?
-Ron
Techpriest <techpriest@ourlair.com> wrote:
By making the tires bigger you increase the torque needed to turn them.
Would putting larger tires on not increase the Highway MPG but decrease the
City MPG?
-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of Alan Fanning
Sent: Wednesday, August 09, 2006 2:30 PM
To: SHOtimes
Subject: Re: [Shotimes] Speedo Error... was: My MPG Test is Working!!
If a 5% reduction in final drive ratio nets an improvement of several mpg's,
I question what the manufacturer's were thinking in not taking advantage of
that.
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